Scraping-machine.



A. A. JACKSON.

SCRAPING MACHINE'.

APPLICATION FILED Nov. I2, 1914.

PatentedJune 27, 1916.

2 SHEETS-SHEET A. A. JACKSON. SCRAPING MACHINE.

APPLICATION FILED Nov. I2. 1914.

1,189,202. i Patented June 27,1916.

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THE COLUMBIA PLANoGRAIH co.. WASHINGTQN. D. c. l

ALFRED A. JACKSON, 0F DENVER, COLORADO.

SCRAPING-MACHINE.

Specicaton of Letters Patent.

y Patented June 27, 1916.

Application led November 12, 1914. Serial No. 871,696.

To all whom t may concern.'

Be it known that I, ALFRED A. JACKSON, a citizen of the United States, residing in the city and county of Denver and State of Colorado, have' invented certain new and useful Improvements in Scraping-Machines; and I do declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appert'ains to make and use the same, reference being had to the accompanying drawings, and to the characters of reference marked thereon, which form a part of this specification.

My invention relates to improvements in scraping machines, my object being to provide a machine of this character which shall be comparatively simple in construction, easily manipulated and exceedingly eflicient for the purpose intended.

The invention disclosed in this application may be considered an improvement over the construction covered by my previous Patent No. 1,109,335, dated September 1,1914.

In this drawing, Figure 1 is a side elevation of my improved machine, with the scraping element applied and the plane removed. Fig. 2 is a side elevation of the form of scraping element shown in Fig. 1. This is a detail view of the scraper shown on a larger scale. Fig. 3 is a sectional view of the scraper, the section being taken through the device longitudinally and centrally thereof. Fig. 4 is a side elevation of the machine, partly in section, showing both the plane and scraping elements in position, the latter being thrown toy the inoperative position while the plane is in the position for use. In this view, a form of scraper is employed which is consistent with the simultaneous mounting of the scraping and planing elements of the machine. Fig. 5 is a side elevation in detail of the form of scraper shown in Fig. 4. Fig. 6 is a top plan view of the forward part of the machine, showing the form of scraper illustrated in Figs. 4 and 5. VThis is a view looking in the direction of arrow 6, Fig. 5, the frame work of the body of the machine being shown partly in dotted lines.

The same reference characters indicate the same parts in all the views.

Let the numeral 5 designate the frame work of my machine, the same consisting of cast iron and being composed of two side members 6 which are suitably spaced by bolts 7 and S, with which the handle 9 is connected, the upper bolt 8 passing through a curved slot 10 formed in the forward part of the sides 6. By loosening the nut 12 on this bolt, the inclination of the handle may be regulated. Passing through the side vmembers 6 and ournaled therein, is an axle 13 upon whose outer extremitiesV which protrude beyond the sides of the machine, are rubber tired wheels 1 4. Mounted on top of the two side members 6, is a weight 15, which is adjustable longitudinally of the machine by loosening a bolt 16, which passes through the weight and enters a cross bar 17, in which the bolt is threaded. The opposite extremities of this cross bar are adapted to enter recesses 18 formed in the adjacent walls of the side members 6. The upper extremity of this bolt is equipped with a hand-piece 19. The forward extremity of the weight is providedwith a handhold 20. The side members 6 of the frame work are provided with rectangular openings 21, whereby the weight of the structure is considerably reduced.

The form of the scraper illustrated in Figs. 1, 2 and 3 will now be described. In this construction, the frame or body member 48 is relatively long and bears against the surface upon which the machine is traveling in front, as shown at 49, and in the rear as shown at 50. Between these parts 49 and 50 the body of the scraper is open, and the opposite sides 51 increase in thickness toward the rear until a point 52 is reached, where the two sides attain their greatest thickness. The lower edges of the sides 51 are cut away as shown at 53 between the engaging surfaces 49 and 50. Between the deepest parts of the side members 51, is located the lower portion of an adjustable block 54, the said block being pivotally mounted upon the sides of the body member by means of a pin or spindle 55 passing through the lower extremity of the block and through registering openings formed in the sides 51 of the frame or body member. To this block is secured the bit 58, the same being held in place by a screw 59 and a lever-like clamping member 60, which is pivoted or fulcrumed on the block by means of a pin 61 passing through a perforation in the member 60 and registering perforations formed in lugs 62 between which this member passes. The member 60 extends below the pivoted pin 61 and bears against the bit 58 as shown at 63. By turning the screw 59 in the proper direction the screw is caused to bear tightly against the bit 58, while the lower extremity of the member 60, is also forced against this plate, whereby the latter is securely locked in the desired position of adjustment. The lower extremity 64 of this bit is shaped to act upon the surface to be scraped, when the machine is traveling in the direction of the arrow at the right of Fig. 1. Pivotally connected with the block 54 above the pivot pin 55, is an adjusting plate 65, having an eye 66 which engages the pin 67 connecting two lugs 68 extending from the rear surface of the block 54. This plate is slotted as shown at 69 to receive a bolt 70 which is passed through the slot in the plate and enters a threaded recess 71 formed in an upright member 72, with which the frame or body member 48 of the scraper is provided. By loosening the bolt 70, and moving the plate 65 forwardly or rearwardly, the inclination of the block 54 and its bit 58 may be changed at pleasure. The rear surface of the block 54 is provided with a recess 73 adapted to receive a securing bolt 74 passing through the opposite side members 6 of the structure. The threaded extremity of this bolt protrudes beyond the outer surface of one of the members 6, and a nut 75 is applied thereto for fastening purposes. By tightening this nut, the two-members 6 of the frame worl: of the machine may be caused to tightly grasp the curved bearing surfaces 76 formed on the opposite sides of the block 54, which serve to engage the adjacent inner surfaces of the sides 6 of the machine.

In Figs. 4, 5 and 6, still another form of scraper is illustrated. This form of the device consists of a block or body member 77 upon which the bit-holder 78 is adjustably mounted by means of a bolt 79, which passes through an opening in a forwardly extending lug 80, the said bolt being threaded into the body part or block 77. By loosening this bolt, the bit-holder 78 may be turned to cause the bit 81 to occupy a position more or less diagonal to the direction of travel of the machine, whereas, the bit has a shearing action upon the floor to be scraped. The bit 81 is clamped between the body part 7 8. of the scraper and an outer plate member 82, which is secured to the body member by a bolt or cap screw 88. The rear part of the block 78 is provided with a recess as shown at 84, to receive the bolt 74, which, when tightened by means of the nut 75, is caused to clamp the block 77 and the parts mounted thereon, in place. This block is provided with upwardly projecting end flanges 85,

which increase the bearing surface of the body member, and tend to secure the tool firmly in place. I further employ set bolts 86 threaded into the members 6 of the machine on opposite sides, their inner extremities engaging the flanges 85 of the block or body member 77. By loosening these set bolts, the bit-holder may be thrown to the active position, (see Fig. 5), or to the inactive or raised position, as shown in Fig. 4.

From the foregoing description, the use and operation of my improvement will be readily understood. When the form of scraper illustrated in Figs. 1, 2 and 3 is employed, thel same is attached to the side members 6 of the frame work of the machine (see Fig. 1). The machine is then moved forwardly or in the direction of the arrow at the right of Fig. 1, in which event,

the cutting extremity 64 of the bit 68 acts upon the floor to perform. the scrapingfunc-l tion. Now, if it is desired to use the form of Scraper shown in Figs. 4, 5 and 6, the scraper shown in Figs. 1, 2 and 3 is removed, and the other form'of scraper applied thereto, the same being supported upon the frame work of the machine through the medium of the bolt 74, and the set bolt 86.y

In the form of scraper construction shown in Figs. 4, 5 and 6, I prefer to emv ploy a set bolt 99 to lock the bit-holding member in place when adjusted for the purpose of varying the angle of the device to the direction of travel of the machine. For instance, by loosening the set bolt 99, the body 78 of this device may be turned upon the bolt 79, so that the bit-holding member may be changed, for instance, from the full line to the dotted line position in Fig. 6. Then, by tightening the set bolt, the bitholder will be secured in the desired position of adjustment.

In order to prevent the metal parts of the machine from enga-ging` the base boards of a room in such a manner as to mar or injure the appearance of the same, I employ two cushion devices 105 which extend outwardly from the rear extremity of each frame member 6 of the structure, the said devices comprising rods 106 whose rear extremities are covered with soft rubber 107. The forward extremities of these rods enter recesses 108 formed in the side members 6 of the structure and are secured in place by means of set bolts 109. These cushion devices are longitudinally adjustable, whereby their rear extremities may be caused at all times to project farther rearwardly than any other part of the machine, thus causing the cushion extremities of these devices to engage the wall or base board of a room before the metal parts of the machine come in Contact therewith.

Attention is called to the fact that where the form of scraper shown in Figs. 1, 2 and 3, is employed, no special scale is required in operating the machine, since it is impossible to vary the depth of cutting, or the operation of the bit by any special manipulation of the machine on the part of the person operating the same, since the body of the device has a flat bearing surface both in the front and rear of the bit or cutting machine. Hence, as long as'the machine is moved forwardly upon the surface to be acted upon, the device will completely perform its function. In this respect, the scraper element is diderent from that shown in Figs. 4 and 5, since when the scraper illustrated in the last named view is employed, its operation will be varied by the tilting of the machine upon its wheels or by other movements from the handle of the apparatus.

The movable weight 15 is particularly advantageous where the form of scraper illustrated in Figs. 1, 2 and 3 is used, since by moving the weight forwardly, it forces the scraper downwardly beneath the surface to be acted upon to the extent of the mass of the weight employed. In this way the downward pressure upon the scraper may be regulated by moving the weight forwardly or rearwardly, as may be required. In fact, where this form of scraper is used, the pressure upon the scraper end of the machine can only be varied by the employment of the weight. Hence, the weight coacts or cooperates in a peculiar manner with the scraper device.

Attention is also called to the fact that the scraper element illustrated in Figs. 1, 2 and 3 is so mounted in the frame work of the structure and between the side walls 6, that it is capable of adjustment on the rod 71 as a pivot, since the bearing surfaces 76 are held in such engagement with the side walls of the frame, that the scraper may be moved upon these bearing surfaces in order to properly adjust it to the surface of the floor to be treated. It will be understood from the construction employed that it is not necessary in order that the scraper be supported within the frame work of the machine, that the surfaces 76 be tightly clamped against the adjacent sides of the frame work of the machine.

Having thus described my invention, what I claim is,-

1. A machine of the class described comprising a frame including two transversely spaced members, a scraper inserted between the said members, said scraper comprising a body part, a bit-holding-block adjustably mounted upon said body part and means passed through the opposite sides of the frame engaging a recess in the bit-holdingbloclr to pivotally support the scraper, whereby the latter may automatically adjust itself to the surface of the floor.

2. A machine of the class described comprising a frame including two transversely spaced members, a scraper inserted between the said members, said scraper comprising a body part, a bit-holding-bloelr having its lower' portion pivotally connected with the body part, an upright member mounted upon the rear of said body part, means for adjustably connecting the said block with the upright member, and a bolt passed through the opposite sides of the frame and adapted to enter a recess in the bit-holdingbloclr to pivotally support the scraper, whereby the latter may automatically adjust itself to the surface of the floor.

3. A machine of the class described. comprising a frame including two transversely spaced members, a scraper' inserted between the said members, a bit-holding-block having its lower portion pivotally connected with the body part, an upright member mounted upon the rear of said body part, an adjusting plate having one extremity pivotally connected with rear of said block and its opposite extremity slotted and adapted to engage the upper extremity of the upright member, a bolt inserted into the upright member for securing the plate in the desired position, and means passed through the opposite sides of the frame and engaging a recess in the bit-holding-block for pivotally supporting the scraper for the purpose set forth.

4. A machine of the class described comprising a frame including two transversely spaced members, a scraper inserted between the said members, said scraper comprising a relatively long body member having an open space therein, a bit-holding-block having its lower extremity pivotally mounted within said space, an upright member formed upon the rear of the body member, and means pivotally connected with the rear of the said block and adapted to be secured to the said upright memberl for varying the inclination of the block, the latter having a recess therein and a bolt passing through the opposite sides of the frame and entering the said recess to pivotally support the scraper, for the purpose set forth.

5. A machine of the class described. compivotelly support the scraper, whereby the l0 prising a frame includingtwo transversely latter may automatically adjust itself to the spaced members, a scraper inserted between surface of the floor. the said members, said scraper comprising a In testimony whereof I affix my signature body part7 n bit-holding-block adjustably in presence of two witnesses.

mounted upon said. body part, said block ALFRED A. JACKSON. also provided with a recess7 and a bolt lVitnesses:

passed through the opposite sides of the MAZE KIRBY,

frame and adapted to enter said recess to A. EBERT OBRIEN.

Copies of this patent may be obtained for jive cents each, by lddressing the "Commissioner or latentl. Washington, D. C. 

